2018 ... Stephen D. Boyles [and ten others] · Active traffic management (ATM) strategies have been considered as a tool for congestion mitigation in the last few decades. They rely on real-time traffic observations to regulate the flow of traffic. This research focuses on developing tools for evaluating the effectiveness of ATM strategies for

2017 ... Research Performed by: Center for Transportation Research (CTR); Research Supervisor: Stephen Boyles; Researchers: Chandra Bhat [and seven others] · "Transportation planning models are commonly used by US planning agencies to aid decision- making processes. In Texas, a statewide analysis model (SAM) is used for

2017 ... Stephen D. Boyles [and eight others] · Given the difference in scope of statewide and MPO models, inconsistencies between the two levels of modelling are inevitable. There are, however, methods to reduce these inconsistencies. This research provides insight into the current practices of statewide modelling across the USA and

[2016] ... [Jen Duthie and others] · "Part of Task 3 of the contract with CTR is to assist CAMPO by identifying areas for model improvement. This effort was completed through a variety of means. Some of the assistance was provided as a result of direct requests from CAMPO leadership to examine CAMPO’s modeling practices as they

2015 ... Mason Gemar [and three others] · This report serves as a summary of the research process regarding the application of right-turn slip lanes in the state of Texas. The work plan was divided into three phases: a review of available literature on the design and operation of right-turn slip lanes, focus group meetings to discuss the

[2014] ... Nan Jiang [and four others] · This work studies the impacts on model performance, sensitivity and results of utilizing different temporal resolution levels for the skims fed to the travel demand component of an integrated ABM-DTA modeling approach. Numerical experiments on real networks will be used to identify trends

[2014] ... Alireza Khani [and 4 others] · A logit transit route choice model is estimated using Capital Metro's on-board survey data. The model is supposed to capture more detailed path attributes and user characteristics such as fare, value of time and user type. The goal is to use the route choice model in a schedule-based transit assignment

2014 ... By Stephen D. Boyles, Christopher Melson, Tarun Rambha, Jennifer C. Duthie · Dynamic traffic assignment has grown steadily in popularity and use since its inception. It has become an important and permanent tool in transportation agencies across the country. However, the exact nature of dynamic traffic equilibrium,

2014 ... Michael Kurker [and nine others] · Lane closures due to highway work zones introduce many challenges to ensuring smooth traffic operations and a safe environment for drivers and workers. In addition, merging has been found to be one of the most stressful aspects of driving and a merge process that is viewed as "unfair"

2013 ... Jennifer C. Duthie [and eight others] · This research employed dynamic traffic assignment (DTA) modeling to study the network-wide impact of bottleneck alleviation measures taken by TxDOT on MoPac Expressway in downtown Austin. The measures led to a small improvement in MoPac travel conditions and no major

2013 ... Research Performed by: Center for Transportation Research; Research Supervisor: S. Travis Waller; Researchers: Jennifer C. Duthie [and seven others] · "The Texas Department of Transportation (TxDOT) made geometric changes to the MoPac Expressway near the downtown Austin area in September 2010 to alleviate the

2012 ... by Joan G. Hudson [and four others] · Researchers believed that if smartphones could prove to be an effective tool for collecting bicycle travel data, the information could be used for aiding decision making as to what types of facilities users prefer and guiding decisions about future facilities. If adequate facilities were provided, the

2012 ... by Jennifer Duthie, Fernanda Leite · This CD-ROM contains a PDF "Very Short Duration Operations: Safety Guidebook" and a 55-slide Microsoft PowerPoint (.pptx) presentation "TxDOT Research Project 0-6640, State of the Practice For Workers in Very Short Duration Work Zone Operations: Educational Module," a workshop

[2011] ... Jennifer Clare Duthie, Natalia Ruiz Juri, and S. Travis Waller · A dynamic traffic assignment (DTA) model was used to evaluate five scenarios of changes to streets in downtown Austin, Texas. Performance measures were gathered not only for the street being changed, but also for streets throughout the rest of

2011 ... Authors: Alison Mills [and five others] · Although roundabouts have now been implemented in many parts of the U.S., very few have been built in Texas. This report contains best practices for choosing appropriate locations and design concepts for Texas roundabouts. This research effort is comprised of the following

2011 ... by Jennifer Duthie and Travis Waller · This CD-ROM contains the Microsoft PowerPoint (.pptx) file containing a 215-slide presentation for the "Roundabout Evaluation and Design Workshop" prepared by CTR and Kittelson & Associates, Inc. for the Texas Department of Transportation. The objectives of the workshop were to

2011 ... Alison Mills [and three others] · "Circular intersection forms have been part of the transportation system in the United States since at least 1905. Their widespread usage decreased after the mid-1950s due to high crash experience and problems with congestion. Therefore, the modern roundabout was developed to improve the safety

2011 ... RS: S. Travis Waller; Researchers: Jenifer Duthie [and three others] · Although roundabouts have now been implemented in many parts of the U.S., very few have been built in Texas. Therefore, this research effort was designed to develop guidelines for implementing them in Texas. The desired guidelines were to suggest best

2010 ... Kara Kockelman [and six others] · "Long-term traffic forecasts require long-term land use forecasts, which may be affected by mid- and near-term transportation infrastructure decisions, as well as traveler choices and associated changes in travel times and the relative access of competing locations. A long-standing methodology

2010 ... Erin M. Ferguson, Jennifer Duthie and S. Travis Waller · Traditionally, transportation road networks have been designed for minimal congestion. Unfortunately, such approaches do not guarantee minimal vehicle emissions. Given the negative impacts of vehicle pollutants as well as tighter national air quality standards, it is

2010 ... John F. Brady [and four others] · As the number of trips made by bicycle continues to increase, there exists a greater need to safely accommodate bicycles within the transportation network. Four experimental bicyclist safety devices were installed and studied in Austin, Texas to determine if they offered a substantial improvement in

2010 ... prepared by the City of Austin Bicycle Team [John Brady and four others] · "As the number of trips made by bicycle continues to increase in Austin, there is a need to design existing roadways to safely accommodate bicyclists at areas where bicyclists and motorists must cross paths. Conflicts are common on facilities where a

2010 ... Prepared by City of Austin Bicycle Team [Jeff Loskorn and four others] · "The primary goal of this study was to determine what effect, if any, bicycle boxes have on bicyclist and motorist safety. Data of bicyclist and motorist behavior was collected under three conditions: while no bicycle box existed, after bicycle box markings

2010 ... Prepared by The City of Austin Bicycle Team, Alison Mills, Jeff Loskorn, John Brady, Jen Duthie, Randy Machemehl · "The primary goal of this study was to determine what effect, if any, “Bicycles May Use Full Lane” signs have on bicyclist and motorist safety. Therefore, pre- and post-implementation data for each of two study

2010 ... Prepared by City of Austin Bicycle Team [John Brady and four others]; prepared for the City of Austin, Neighborhood Connectivity Division, Bicycle Division · "The primary goal of this study was to determine what effect, if any, sharrows have on bicyclist and motorist safety. Therefore, pre- and post-implementation data for

2009 ... Jennifer Duthie [and three others] · Since transportation infrastructure projects have a lifetime of many decades, project developers must consider not only the current demand for the project but also the future demand. Future demand is of course uncertain and should be treated as such during project design. Previous research for

2008 ... Kara Kockelman [and six others] · This work provides integrated transportation land use modeling guidance to practitioners in Texas regions of all sizes. The research team synthesized existing land use modeling experiences from MPOs across the country, examined the compatibility of TELUM's and UrbanSim's requirements

2008 ... RS: Kara Kockelman; Researchers: Jennifer Duthie [and five others] · The CTR research team interviewed staff at 30 metropolitian planning organizations (MPOs) from around the U.S. regarding land use modeling practices and available data sets. They examined literature and experiences across a wide variety of

[2007] ... Varunraj Valsaraj [and three others] · "The FHWA’s publicly available Transportation, Economic, and Land Use Model (TELUM) predicts the future spatial distributions of employment and households using Putman’s Integrated Transportation Land Use Package (ITLUP) equations. TELUM was used here to generate the employment

2006 ... Jennifer Duthie and S. Travis Waller · As long-term forecasts of origin-destination (O-D) travel demands are inherently uncertain, future network performance cannot be predicted with certainty. Neglecting the uncertainties present can result in inaccurate measures of network performance that may lead to incorrect policy